Pulverizing machine



Oct. 13, E;H.ELZEMEYER PULVERIZING MACHINE Filed July 1925 lllllll Patented Oct. 13, 1925..

UNITED STATES rarest orrica.

ERNST H. ELZEMEYER, OF ST. LOUIS, MISSOURI, ASSIGINOR TO AMERICAN PULVERIZER COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

rurvnnrzme MACHINE.

Application filed July 6, 1925. Serial No. 41,663.

T 0 all whom it may concern:

Be it known that I, ERNST H. ELZEMEYER, a citizen of the United States, and a resident of the city of St. Louis and State of Missouri, have invented a certain new and useful Improvement in Pulverizing Machines, of which the following is a specification.

This invention relates to p'ulverizing machines of the type shown in Knittel Patent No. 1,424,922 dated August 8, 1922, wherein a rotor loosely supports a series of circumferentially spaced rings adapted to cooperate with the grinding surfaces of the pulverizer.

The principal object of the present invention is an improved arrangement of rings for pulverizing machines of the above type which will provide additional crushing and grinding surfaces and thereby increase the efficiency of said machines. Other objects are simplicity and cheapness of construction and compactness of design.

The invention consists principally in sets of rings loosely mounted on supporting rods arranged radially around the shaft of a pulverizing machine so as to rotate therewith, each set of rings comprising an inner ring loosely supported on its supporting rod and a larger outer ring loosely surrounding said inner ring. The invention also consists in the arrangements and combinations of parts hereinafter described and claimed.

In the accompanying drawing, which forms part of this specification, and wherein like symbols refer to like parts wherever they occur,

Fig. 1 is a vertical transverse section through a pulverizing machine embodying my invention, and

Fig. 2 is an enlarged perspective view of one set of rings and the supporting rod therefor.

Referring to Fig. 1 of the drawings, my invention is shown in connection with a pulverizer comprising an upper casing 3 and a lower casing 4 having removable sec tions 5 for clamping them together. The

main shaft 6 of the machine is mounted in bearings formed in the end walls of the lower casing. Each end wall of the lower casing is provided with an arcuate flange 7 which supports the ends of a grinding concave 8 and grate bars 9; The end walls of the lower casing are secured together by rods 10 located inside the casing below the grinding concave and the grate bars. Mounted on the shaft 6 in a recess formed in the inner faces of the end walls of the casing are end plates or disks 11. The disks are keyed to the shaft 6 so as to be rigid therewith and are connected to each other near the outer edges by a series of spaced parallel rods 12.

Arranged on the series of rods 12 are sets of rings A. Mounted on the shaft 6 between the disks 11 are spiders 15, the radially extending arms 16 0f which are perforated to receive the supporting rods 12, thus forming supports for the same intermediate their ends. The radially extending arms 16 of the spiders 15 serve to space the sets of rings A on the supporting rods. The hub portions of the spiders 15 are keyed to the shaft 6 and abut against each other thereby spacing the arms and the spiders the desired distance from each other.

Each set of rings A comprises an inner ring 17 loosely mo'unted on the supporting rod 12 and a larger outer ring 18 loosely surrounding said inner ring. The large outer rings 18 act as percussion members to break or shatter the large pieces of material, and they also act as rollers to crush the material over which they roll or ride. As shown in the drawing, the peripheral surface of some of the outer rings 18 may be provided with a series of notches 18, the shoulders 1S formed by said notches forming hammer faces which serve to loosen up any material which tends to pack on the grinding surfaces as well as to pulverize the material. 7

With this double-ring arrangement, material entering the spaces between the opposing surfaces of the inner and outer rings 17 and 18 will be crushed or pulverized by the rotary or radial movement of one ring with respect to the other. The opposing surface of each pair of rings form additional crushing or grinding surfaces with the re suit that the machine has a greater capacity for crushing or finely comminuting the material.

The foregoing arrangement is considered only as an example; and I do not wish to be limited to the type of machine shown, as my invention is applicable to other types of pulverizers.

WVhat I claim is:

l. A pulverizing machine comprising a casing having grinding surfaces, a carrier rotatably mounted therein, and sets of rings supported on said carrier to revolve therewith, each set of rings comprising aninner ring loosely mounted on said carrier and an outer ring loosely surrounding said inner ring and adapted to cooperate with said grinding surfaces.

therewith, each of said sets of members com prising an apertured inner member loosely mounted on sald carrier and an apertured outer member loosely surrounding sald inner member and adapted to cooperate therewith and With said grinding surfaces.

-Signed atSt. Louis, Missouri, this 30th day of June, 1925.

ERNST H. ELZEMEYER. 

